/*
 * FreeRTOS Kernel V10.3.1
 * Copyright (C) 2020 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * http://www.FreeRTOS.org
 * http://aws.amazon.com/freertos
 *
 * 1 tab == 4 spaces!
 */


#ifndef PORTMACRO_H
    #define PORTMACRO_H

    #ifdef __cplusplus
        extern "C" {
    #endif

/*-----------------------------------------------------------
 * Port specific definitions.
 *
 * The settings in this file configure FreeRTOS correctly for the
 * given hardware and compiler.
 *
 * These settings should not be altered.
 *-----------------------------------------------------------
 */

/* Type definitions. */
    #define portCHAR          char
    #define portFLOAT         float
    #define portDOUBLE        double
    #define portLONG          long
    #define portSHORT         short
    #define portSTACK_TYPE    uint8_t
    #define portBASE_TYPE     char

    typedef portSTACK_TYPE   StackType_t;
    typedef signed char      BaseType_t;
    typedef unsigned char    UBaseType_t;

    #if ( configUSE_16_BIT_TICKS == 1 )
        typedef uint16_t     TickType_t;
        #define portMAX_DELAY    ( TickType_t ) 0xffff
    #else
        typedef uint32_t     TickType_t;
        #define portMAX_DELAY    ( TickType_t ) 0xffffffffUL
    #endif
/*-----------------------------------------------------------*/

/* Hardware specifics. */
    #define portBYTE_ALIGNMENT    2
    #define portSTACK_GROWTH      ( -1 )
    #define portTICK_PERIOD_MS    ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
    #define portYIELD()    asm volatile ( "TRAPA #0" )
    #define portNOP()      asm volatile ( "NOP" )
/*-----------------------------------------------------------*/

/* Critical section handling. */
    #define portENABLE_INTERRUPTS()     asm volatile ( "ANDC	#0x7F, CCR");
    #define portDISABLE_INTERRUPTS()    asm volatile ( "ORC  #0x80, CCR" );

/* Push the CCR then disable interrupts. */
    #define portENTER_CRITICAL()       \
    asm volatile ( "STC	CCR, @-ER7" ); \
    portDISABLE_INTERRUPTS();

/* Pop the CCR to set the interrupt masking back to its previous state. */
    #define  portEXIT_CRITICAL()    asm volatile ( "LDC  @ER7+, CCR" );
/*-----------------------------------------------------------*/

/* Task utilities. */

/* Context switch macros.  These macros are very simple as the context
 * is saved simply by selecting the saveall attribute of the context switch
 * interrupt service routines.  These macros save and restore the stack
 * pointer to the TCB. */

    #define portSAVE_STACK_POINTER()       \
    extern void * pxCurrentTCB;            \
                                           \
    asm volatile (                         \
        "MOV.L	@_pxCurrentTCB, ER5			\n\t"\
        "MOV.L	ER7, @ER5					\n\t"\
        );                                 \
    ( void ) pxCurrentTCB;


    #define portRESTORE_STACK_POINTER()    \
    extern void * pxCurrentTCB;            \
                                           \
    asm volatile (                         \
        "MOV.L	@_pxCurrentTCB, ER5			\n\t"\
        "MOV.L	@ER5, ER7					\n\t"\
        );                                 \
    ( void ) pxCurrentTCB;

/*-----------------------------------------------------------*/

/* Macros to allow a context switch from within an application ISR. */

    #define portENTER_SWITCHING_ISR()    portSAVE_STACK_POINTER(); {
    #define portEXIT_SWITCHING_ISR( x )         \
    if( x )                                     \
    {                                           \
        extern void vTaskSwitchContext( void ); \
        vTaskSwitchContext();                   \
    }                                           \
    }                                           \
    portRESTORE_STACK_POINTER();
/*-----------------------------------------------------------*/

/* Task function macros as described on the FreeRTOS.org WEB site. */
    #define portTASK_FUNCTION_PROTO( vFunction, pvParameters )    void vFunction( void * pvParameters )
    #define portTASK_FUNCTION( vFunction, pvParameters )          void vFunction( void * pvParameters )

    #ifdef __cplusplus
        }
    #endif

#endif /* PORTMACRO_H */
